ADC controlled half-bridge LC series resonant converter for LED lighting

In this paper, a soft switched LED driver is proposed for LED lighting applications. It consists of half-bridge LC series resonant converter. The converter output is connected in series with DC voltage to drive the LED load. Asymmetric Duty Cycle control (ADC) is used. The proposed driver offers the features of dimming control, voltage regulation and current regulation in LED loads. It provides less ripple content and eliminates the need of bulk electrolytic capacitors. This configuration can be extended to multiple loads. The detailed description, circuit analysis and simulation results of the proposed converter are presented.